Hydrogen Bond

What property of water allows it to act as a solvent for many biochemical reactions?

• High viscosity

• Low surface tension

• High heat capacity

• Polarity and ability to form hydrogen bonds

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SYI-1A

Topic-1.1

In a group of water molecules, hydrogen bonds form between __________.

• the hydrogen atoms in a single water molecule

• the oxygen atom in one water molecule and a hydrogen atom in another water molecule

  
  

• two hydrogen atoms in different water molecules

• the oxygen atoms in different water molecules

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NGSS.HS-ESS2-5

The tendency of water molecules to stay close to each other as a result of hydrogen bonding __________.

• provides the surface tension that allows leaves to float on water

• is called cohesion

• keeps water moving through the vessels in a tree trunk

• acts to moderate temperature

• All of the choices are correct.

Tags

NGSS.HS-ESS2-5

What do cohesion, surface tension, and adhesion have in common with reference to water?

• All are properties related to hydrogen bonding.

• All have to do with ionic interactions.

• All are results of the structure of the hydrogen atom.

• All are aspects of a crystalline structure.

• All are produced by covalent bonding.

Describe the difference between a strong and weak hydrogen bond.

• Strong hydrogen bonds are always longer than weak ones.

• Weak hydrogen bonds are stronger due to lower electronegativity.

• Strong hydrogen bonds do not involve electronegativity differences.

• Strong hydrogen bonds are shorter and stronger due to high electronegativity, while weak hydrogen bonds are longer and weaker.

How does hydrogen bonding affect the properties of water?

• Hydrogen bonding decreases water's boiling point.

• Hydrogen bonding causes water to freeze at higher temperatures.

• Hydrogen bonding causes water to have high surface tension, high specific heat, and unique density properties.

• Hydrogen bonding makes water a poor solvent.

Tags

NGSS.HS-ESS2-5

Explain how hydrogen bonds influence the boiling point of water.

• Hydrogen bonds increase the boiling point of water by decreasing the energy required to break them.

• Hydrogen bonds lower the boiling point of water by weakening intermolecular forces.

• Hydrogen bonds have no effect on the boiling point of water.

• Hydrogen bonds raise the boiling point of water by requiring more energy to break the strong intermolecular forces.

How do hydrogen bonds contribute to the unique properties of ice?

• Hydrogen bonds create a stable lattice structure in ice, making it less dense than water, allowing it to float.

• Hydrogen bonds increase the temperature of ice, causing it to melt faster.

• Hydrogen bonds make ice denser than water, causing it to sink.

• Hydrogen bonds prevent ice from forming a solid structure, making it liquid.

How does the presence of hydrogen bonds influence the melting point of a substance?

• Hydrogen bonds have no effect on the melting point.

• Hydrogen bonds only influence the boiling point, not the melting point.

• The presence of hydrogen bonds increases the melting point of a substance.

• Hydrogen bonds decrease the melting point of a substance.

How do hydrogen bonds contribute to the phenomenon of capillary action?

• Hydrogen bonds only affect the temperature of water, not its movement in capillary action.

• Hydrogen bonds enable water molecules to adhere to surfaces and to each other, facilitating capillary action.

• Hydrogen bonds cause water to evaporate quickly, reducing capillary action.

• Hydrogen bonds prevent water from sticking to surfaces, hindering capillary action.

Tags

NGSS.MS-PS1-4